Science

Scientists spot 1,800 supernovae in the distant universe


Scientists spot 1,800 new supernovae in the distant universe in remarkable discovery using the Subaru Telescope

  • New supernovae were spotted with the 8.2-meter Subaru Telescope in Hawaii
  • Scientists discovered some as far as 8 billion light years away, the team said
  • The findings could lead to more accurate calculations of universe’s expansion 

Scientists have spotted thousands of dying stars in the process of exploding out of existence.

A team operating the 8.2-meter Subaru Telescope in Hawaii say they’ve identified roughly 1,800 new supernovae sitting as far as eight billion light years away.

The trove of new data, including several supernovae of a type known to be useful in calculating star distance, could help to unlock new clues on the expansion of the universe, researchers say.

Scientists have spotted thousands of dying stars in the process of exploding out of existence. A team operating the 8.2-meter Subaru Telescope in Hawaii say they’ve identified roughly 1,800 new supernovae sitting as far as eight billion light years away

Scientists have spotted thousands of dying stars in the process of exploding out of existence. A team operating the 8.2-meter Subaru Telescope in Hawaii say they’ve identified roughly 1,800 new supernovae sitting as far as eight billion light years away

A team including researchers from the Kavli Institute for the Physics and Mathematics of the universe (Kavli IPMU), Tohoku University, Konan University, the National Astronomical Observatory of Japan, School of Science, the University of Tokyo, and Kyoto University published the findings this week in the Publications of the Astronomical Society of Japan.

While supernovae are rare events, astronomers were able to capture ultra-sharp images using Suparu’s Hyper Suprihyper suprimeme-Cam, an 870 mega-pixel camera that can capture wide angles in one shot.

In the latest effort, the team repeatedly imaged the same portion of the night sky over the course of six months, revealing the supernova hiding in the distant universe based on how stars changed in brightness.

The discoveries include five super luminous supernovae, and roughly 400 Type Ia supernovae – 58 of which are situated more than 8 billion light years away.

In the latest effort, the team repeatedly imaged the same portion of the night sky over the course of six months, revealing the supernova hiding in the distant universe based on how stars changed in brightness. These are plotted above

In the latest effort, the team repeatedly imaged the same portion of the night sky over the course of six months, revealing the supernova hiding in the distant universe based on how stars changed in brightness. These are plotted above

This was possible thanks to the advanced capabilities of the Subaru telescope; it took Hubble more than 10 years to discover a comparable number supernovae.

‘The Subaru Telescope and Hyper Suprime-Cam have already helped researchers create a 3-D map of dark matter, and observation of primordial black holes, but now this result proves that this instrument has a very high capability finding supernovae very, very far away from Earth,’ said Professor Naoki Yasuda.

The new cache of Type Ia supernovae will help scientists calculate the expansion of the universe more accurately.

The discoveries could also shed light on the nature of dark energy.

WHAT IS A SUPERNOVA AND HOW DOES IT FORM?

A supernova occurs when a star explodes, shooting debris and particles into space.

A supernova burns for only a short period of time, but it can tell scientists a lot about how the universe began.

One kind of supernova has shown scientists that we live in an expanding universe, one that is growing at an ever increasing rate.

Scientists have also determined that supernovas play a key role in distributing elements throughout the universe.

In 1987, astronomers spotted a ‘titanic supernova’ in a nearby galaxy blazing with the power of over 100 million suns (pictured)

In 1987, astronomers spotted a ‘titanic supernova’ in a nearby galaxy blazing with the power of over 100 million suns (pictured)

There are two known types of supernova.

The first type occurs in binary star systems when one of the two stars, a carbon-oxygen white dwarf, steals matter from its companion star.

Eventually, the white dwarf accumulates too much matter, causing the star to explode, resulting in a supernova.

The second type of supernova occurs at the end of a single star’s lifetime.

As the star runs out of nuclear fuel, some of its mass flows into its core.

Eventually, the core is so heavy it can’t stand its own gravitational force and the core collapses, resulting in another giant explosion. 

Many elements found on Earth are made in the core of stars and these elements travel on to form new stars, planets and everything else in the universe.

 





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